Car roof



Patented Apr. 3, 1923.

y i; ir E S T TES j"1,450,243 PATENT orifice CHARLES DAVID BoNsALL, oF PITTSBURGH, PENNSYLVANIA, AssIGrNoR To P. H.

MURPHY COMPANY, v0F OF PENNSYLVANIA.

v Application led May 24,

all-steel riveted-up type wherein heavy gage roofing sheets extend fromside to side of the car and arerigidly secured together and to each other to form a load sustainlng structure; and it relates morel particularly to roofs of thekind wherein the side marginal portions of adjacentsheets cooperatey to form weather proofing hollow box-girder seams or joints that function as carlines.

The present invention hasv for its rincipal object to increase the strengt or rigidity of the roof by improving they sectional shape and arrangement of the cooperating side marginal portions of adjacent roof sheets. Other objects are to simplify the construction of the roof and to cheafpen the cost of manufacture.

The invention consists -principally in the improved weather proofingl box-girder seam or joint construction hereinafter shown and described; and it also consists in the combinations and arrangements of parts hereinafter described and claimed.

In the accompanying drawing, which forms part of this specification, and wherein like symbols refer t0 likeparts wherever they occur,

Fig. 1 is a plan view of a portion ofa car roof lembodying my invention;

2 is an enlarged transverse section throughone half of the roof onthe line 2 2 in Fig. l; v

Fig. 3 is a longitudinal section along the ridge line -of the roof on the `line 3-3 in gig. 4 is a vertical cross-section through one of the box-girder seams midway of the ridcge and eaves on the line 4 4 in Fig. 1; an

Fig. 5 is a similar section through said boX-girder seam, the section being taken adjacent to the eaves on the line 5-5 in Fig. l.

The present roof` comprises transversely arranged load sustaining roofing sheets 6, which extend from eaves to eaves of the NEW KENSINGTON, PENNSYLVANIA, A CORPORATION CAR ROOF.

1922. Serial N0. 563,225.

veaves ends on the outwardly projecting uppermost flanges of angle-bar side plate 7 and are' rigidly secured to said supporting flanges by means of rivets 8. The eaves ends of the sheets are provided with depending eaves portions 9 which overhang the outer edges of the top flanges of the side plates and constitute drip flanges.

The roof sheets slope upwardly from the 'eaves to the ridge to form a hip roof and are -assembled on. the carframe by lapping their side marginal portions which are rigidly secured together along two lines by double row of rivets 10. The overlapping portion of each sheet between the two lines of rivets 10 is formed into an inverted channel ll which cooperates with the underlapping portion of the next adjacent sheet between said lines to form a hollow boxf girder seam or joint. Thus, each sheet has the invertedV channelfor stiflening rib 11 formed in one side marginal 'portion only,

which channel or ribbed portion overlapsj the plain margin of the next adjacent sheet and is rigidly secured thereto on opposite sides of said ribbed portion to form the hollow box-girder joint. f i

Running of the car at the ridge and are supported on the uppermost lateral flanges of Z-shaped running board saddles 13, whose lower flanges rest on and are rigidly secured to the lapping portions of the sheets vby the rivets l0.

The pressed up 'ribs lll are deepest atthe ridge and gradually decrease in depth towards the eaves where they merge intothe plane of the body of the sheets; and said ribs have a Vminimum width at :the ridge and widen gradually to the eaves.

Tt is noted that the sheet blanks, from which the sheets are pressed, are Yof rectangular shape. Therefore, such rectangular blanks may be pressedl up -without any trimming thereof to form ribs of gradually decreasing depth and gradually increasing width 4from ridge to eaves.

Theinner wall'of each upstanding hollow rib l1 of a sheet extends in avv straight line transversely of the car from eaves to eaves thereof; and the outer wall of said rib, together with the marginal portion of the sheet located beyondv the rib, diverges from said inner wall oneach side of the boards l2 extend longitudinally ridge towards the eaves. Thus, the ribbed overlapping marginal portions of the sheets are substantially K-shaped in plan and function as boX-girder carlines to brace and stiften the car-body against horizontal stresses, which tend to twist the carlines and buckle the roof sheets, and to increase the load carrying capacity of the roof.

What I claim is:

l. A car roof comprising a series of rootl sheets connected along their side margins by hollow box-girder seams. one wall of a seam extending in a straight line transversely of the car substantially at right angies to the eaves ends of the sheets, and the opposite wall of said seam diverging from said 'transversely extending stra-ight wall on opposite sides of the ridge.

2. car root' comprising a series of root sheets connected along their side margins by hollow boX-girder seams of varying depth from ridge to eaves, one side wall o? a seam vextending in a straight line transversely of the car substantially at right angles to the eaves ends of the sheets, and the opposite side wall of said seam diverging from said straight side wall on opposite sites of the ridge.

3. A ear root comprising a series of root .,heets connected along their side margins hy hollow seams, one wall of aV seam extending in astraight line from eaves to eaves substantially at right angles thereto, and

the opposite wall of said seam extending 'from eaves to eaves in the form of an obtuse angle.

t. A car roof comprising a series of roof sheets connected along their side margins by hollow upstanding seams of gradually decreasing height from ridge to eaves, one side wall ot' a seam extending in astraight line from eaves to eaves, substantially at right angles thereto, and the opposite side wall of said @am extending from eaves to eaves in the form of an obtuse angle Whose is located at the ridge..

5. A car root' comprisingY nietai roof sheets extending from eaves to eaves and having their side margins overlapped and riveted together along two .rows to torni a rigid lap-joint, one line of rivets oi a joint extending transversely of the rar from eaves to eaves substantially at right angles thereto. and the other line ot rivets o? said joint diverging Jfrom said transverse line on opposite sides ot' the ridge.

G. :a ear roof comprising metal roof vsheet-s extending from eaves to eat/*es and having their side margins overlapped and riveted together along two rows to torm arrigid lap-joint, one line of rivets ot a joint. extending transversely of the car from eaves to eaves substantially at right angles thereto, and the other line of rivets a plurality of a plurality of of said joint extending from eaves to eaves in the form ot' an obtuse angle whose vertex is located at the ridge.

T. A car root comprising a plurality ot' roof sheets extending from eaves to eaves and having their side marginal portions overlapped, the overlapping portion of a sheet being Jformed with an upstanding hollow rib, one wall oi' which is straight and extends transversely o'tl the car substantially at right angles to the sides thereof. the opposite wall of lsaid rib diverging from said transversely extending wall on opposite sides of the ridge.

8. A car root' comprising a plurality of root' sheets extending t'rom eaves to eaves with their side marginal portions overlapped and rigidly secured together, one only of the lapped margins ot a sheet being formed with a stiti'ening rib the inner side wall ot which extends transversely of the car, substantially1 at right angles to the eaves line thereof, the outer side wall of said rib diverging from said transversely extending inner side wall on opposite sides of the ridge.

S). A car root comprising a plurality of metal root sheets extending from eaves to eaves and having their side marginal portions overlapped to form hollow box-girder joints, the lapping portions of said sheets being rigidly secured together on opposite sides of said box-girders, one side wall of a. box-girder extending transversely ot the car from eaves to eaves substantially at right angles thereto.l and the opposite side wall ot' said box-girder diverging from said transversely extending wall on opposite sides of the ridge. Y

10. A car root comprising a plurality of root' sheets extending from eaves to eaves with their side margins lapping each other and riveted together along two lines, the portion ot one sheet between said lines being` formed with a4 hollow stiii'ening rib, one side wall ot a rib. together with the line of rivets adjacent thereto. extending transversely ot the car from eaves to eaves silbstantiallyat right angles thereto. and the opposite side wall ot' said rib. together with the line of rivets adjacent thereto. diverging from said transversely extending wall and rivets from ridge to eaves.

1l. A car root' sheet having a hollow rib formed therein. one wal] ot' which is straight and extends longitudinally of the sheet substantially at right angles to the eaves ends thereof. the. opposite wall of said rib diverging from said longitudinally extending wall on opposite sides of the ridge line of said sheet.

l2. A car root sheet having a hollow.: rib formed therein of varying depth from ridge to eaves. one wall of which is straight and extends longitudinally of the sheet substan- 5 sheet.

13. A car roof sheet having a hollow rib formed therein, one wall of which is straight and extends longitudinally of the sheet from end to end thereof substantially at right angles to said ends, the opposite wall of said rib extending from end to end of the sheet in the form of an obtuse angle.

14. A car roof sheet having a hollow rib formed therein, one wall of which is straight and extends longitudinally of the sheet from end to end thereof substantially at right angles to said ends, the opposite wall of said rib extending from end to` end of the sheet in the form of an obtuse angle, whose vertex is located at the ridge.

Signed at New Kensington, Pa., this 19t-h day of May, 1922.

CHARLES DAVID BONSALL. 

